*{
	padding: 0;
	margin: 0;
	list-style: none;
}
.header{
	/*width: 1080px;
	height: 50px;*/
	background: rgb(37,41,46);
}
.W{
	width: 990px;
	height: 50px;
	margin: 0 auto 0 auto;
}
.header .logo{
	width: 120px;
	height: 50px;
	background: url(../img/logo.png);
}
.right{
	width: 870px;
	height: 50px;
}
.nav1{
	float: right;
	padding: 15px 0 0 0;
}
.right li{
	float: left;
	color: rgb(102,102,102);
	width: 60px;
	font-size: 15px;
}
.right .a{
	width: 50px;
	color: white;
}
.right .b{
	color: rgb(102,102,102);
	width: 20px;
}
.search{
	width: 990px;
	height: 50px;
	margin: 0 auto;
}
.nav2{
	float: left;
	padding: 15px 0 0 0;
}
.search li{
	float: left;
	color: black;
	width: 100px;
	font-size: 15px;
	text-align: center;
}
.img-search{
	float: right;
	width: 30px;
	height: 30px;
	background: url(../img/搜索.png);
	margin: 10px 0 0 0;
}
.line{
	float: left;
	width: 990px;
	height: 5px;
	background: rgb(237,237,237);
}
.box1{
	width: 990px;
	height: 475px;
	margin: 0 auto;
	overflow: hidden;
}
.box1 .big-img{
	float: left;
	/*动画设置,css3出现的标签 transition
	 0.5s：设置动画持续时间
	 初始状态：  1张   margin-left：-800px
	 结束状态：  2张 margin-left：-1600px
	 * */
	transition: 0.5s;
	/*设置大盒子的宽度，容纳所有的图片*/
	width: 4950px;
	height: 475px;
	/*左边的外边距*/
	/*margin-left: -400px;*/
}
.box1 .big-img li{
	float: left;
}
.box1 .big-img li img{
	width: 990px;
}
.box1 .img2{
	position: absolute;
	width: 990px;
	height: 50px;
	top: 320px;
}
.box1 .img2 li{
	cursor: pointer;
}
.box1 .img2 .arrow1{
	float: left;
}
.box1 .img2 .arrow2{
	float: right;
}